Optimization and biokinetic studies on pretreatment of sludge for enhancing biogas production

The present research focuses on the experimental study of the effect of alkaline pretreatment with NaOH on biogas production. Different concentrations of NaOH, i.e. 1, 2.5 and 5% (w/w), were tested on the lagoon station's sludge (dry basis) at room temperature for 24 h. The results obtained after 60 days of digestion, through the cumulative volume of biogas recorded, clearly indicate a positive effect of the chemical alkaline pretreatment on the anaerobic digestion since the amount of biogas produced increased by 42.6% when the NaOH concentration was close to 2.5%. This concentration is considered optimal under the chosen conditions. Indeed, inhibition of the methanogenic activity and a blockage of the digestion process are observed beyond this concentration. These results suggest that the alkaline pretreatment can improve the energy efficiency of the obtained biogas (CH4 content) and reduce the residence time.

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“…The reactors were manually agitated two to three times per day. 25 The experiment was performed for a retention time of 60 days.…”

Section: Experimental Setup For Anaerobic Digestionmentioning

confidence: 99%

Experimental Study of Increase of Biogas Production from Lagoon Station's Sludge by Alkaline Pretreatment

Dahou

Kouider

Dehmani

et al. 2022

Energy & Environment

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Chapter 10 Climate Change Responses and Adaptations in Crassulacean Acid Metabolism (CAM) Plants

Pereira

Niechayev

Blair

et al. 2021

Advances in Photosynthesis and Respiration

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Effect of Phosphorus Concentration on Alkali and Heavy Metals Transformation Under Agglomeration/Defluidization During Fluidized Bed Simulated Sludge Co-combustion

Lin

Kuo

Xiong

et al. 2019

Waste Biomass Valor

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Optimization and biokinetic studies on pretreatment of sludge for enhancing biogas production

Cited by 9 publications

References 20 publications

Experimental Study of Increase of Biogas Production from Lagoon Station's Sludge by Alkaline Pretreatment

Experimental Study of Increase of Biogas Production from Lagoon Station's Sludge by Alkaline Pretreatment

Chapter 10 Climate Change Responses and Adaptations in Crassulacean Acid Metabolism (CAM) Plants

Effect of Phosphorus Concentration on Alkali and Heavy Metals Transformation Under Agglomeration/Defluidization During Fluidized Bed Simulated Sludge Co-combustion

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